Similar to the Indonesian slang term "otot polos" with this same meaning, this tongue-in-cheek term referring to Deadpool's poor self-control, particularly in his tendency to swear and act impulsively. This phrase playfully implies that, like smooth muscle tissue, which operates involuntarily, Deadpool's mouth runs on autopilot, often leading to hilariously inappropriate outbursts.
I love how Deadpool is total smoothmuscle—his swearing just pops out without a filter, making every scene even more entertaining!
While our lifespan is the number of years we will live, our healthspan is the number of healthy years we will have and our sexspan is is the number of years we will continue to be healthy enough to continue having an active sex life.
A lighthearted reaction upon receiving disappointing news of some sort. Usually something that isn't a particularly a big deal, esp. when it primarily affects someone else - sort of a mild schadenfreude. Sometimes doubled or tripled, and possibly said in a sing-songy voice for added comedic effect to imitate a muted trumpet, which is how the meme originated.